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Finding the Fourth Proportional to 210,507.58, 290,504.64 and 115,020.19

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Solution

The fourth proportional to 210,507.58, 290,504.64 and 115,020.19 is: 158,730.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,507.58 : 290,504.64 = 115,020.19 : x
  2. Step 2: Convert to fraction form
    210,507.58/290,504.64 = 115,020.19/x
  3. Step 3: Cross multiply
    210,507.58x = 290,504.64 × 115,020.19
  4. Step 4: Simplify right side
    210,507.58x = 33,413,898,888.68
  5. Step 5: Solve for x
    x = 33,413,898,888.68/210,507.58
  6. Step 6: Final answer
    x = 158,730.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.